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Science CBSE Homework Assignments
Class 7
Electric current and its effects
Heating effect in appliances
2.
Incandescent electric bulbs
Question:
5
m.
State true or false
:
1
.
The bulb is made up of a plastic that is fixed on a metallic base.
-
True
False
2
.
Incandescent electric bulbs are better than the CFLs and the fluorescent tube-lights.
-
True
False
3
.
Filament is made of thick tungsten wire.
-
False
True
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